Re: Further fun with ABI tracking

On Tue, Feb 14, 2017 at 9:31 PM, Jan Blunck [off-list ref] wrote:

quoted

1. Downstreams to insert Major version into soname
Distributions could insert the DPDK major version (like 16.11) into the
soname and package names. A common example of this is libboost [5].
That would perfectly allow 16.07.<LIBABIVER> to coexist with
16.11.<LIBABIVER> even if for a given library LIBABIVER did not change.
Yet it would mean that anything depending on the old library will have to
be recompiled to pick up the new code, even if it depends on an ABI that

is

quoted

still present in the new release.
Also - not a technical reason - but it is clearly more work to force

update

quoted

all dependencies and clean out old packages for every release.

Actually this isn't exactly what I proposed during the summit. Just
keep it simple and fix the ABI version of all libraries at 16.11.0.
This is a proven approach and has been used for years with different
libraries.

Since there was no other response I'll try to wrap up.

Yes #1 also is my preferred solution at the moment.
We tried with individual following the tracking of LIBABIVER upstream but
as outlined before we hit too many issues.
I discussed it in the deb_dpdk group which acked as well to use this as
general approach.
The other options have too obvious flaws as I listed on my initial report
and - thanks btw - you added a few more.

@Bruce - sorry I don't think dropping config options is the solution. Yet
my suggestion does not prevent you from doing so.

You could easily do this independently of us upstream
fixing the ABI problems.

I agree, but I'd like to suggest the mechanism I want to implement.
An ack by upstream for the Feature to set such a major ABI would be great.
Actually since it is optional and can help more people integrating DPDK
getting it accepted upstream be even better.

I'll send a patch in reply to this thread later today that implements what
I have in mind.


-- 
Christian Ehrhardt
Software Engineer, Ubuntu Server
Canonical Ltd